/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraParameterMapHistory.h
If this is variable is a parameter in one of our tracked collections, return it.
[FParameterCollection](API\Plugins\NiagaraEditor\TNiagaraParameterMapHistory\FParameterCollection) IsParameterCollectionParameter ( [FNiagaraVariable](API\Plugins\Niagara\FNiagaraVariable) & InVar, bool & bMissingParameter )